3 x 10 x 4 Shielded Fishing Reel Ball Bearings, each bearing has 2 metal shields to protect the bearing from dust or any possible contamination, inner diameter is 3mm, outer diameter is 10mm, and width is 4mm.

• Item: 3 x 10 x 4 Fishing Reel Bearings
• Type: Deep Groove Ball Bearings
• Shields: 2 Metal Shileds
• Dimensions: 3mm x 10mm x 4mm/Metric
• Inner Diameter: 3mm
• Outer Diameter: 10mm
• Width: 4mm
• Size: 3 x 10 x 4 mm
• Quantity: 10 Bearings
• Dynamic load rating Cr: 640 N
• Static load rating Cor: 230 N
• Limiting Speed:
  • Grease Lubrication: 52,000 RPM
• Packing: 10 bearings in One plastic tube
• KOYO: 623ZZ
• NSK:623ZZ
• NMB: R-1030ZZ
• Equal: 623-2Z